| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC50 Denbighshire, Llyn Moelfre | Cambridge Botany Schppl Expedition, Wales | | 23/8/1955 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC38 Warwickshire, Balsall Common | Henry Bromwich | | 9/1871 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC27 East Norfolk, Weybourne | Dorothy Adlington Cadbury | | 20/8/1957 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC6 North Somerset, Weston in Gordano | Ida Mary Roper | Watson Botanical Exchange Club Joseph Edward Little | 27/8/1919 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC47 Montgomeryshire, Breidden Hill | Cambridge Botany Schppl Expedition, Wales | | 23/8/1955 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1947 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Hick's Mill, Gwennap | Cyril West | | 9/1946 | CGE |
| Mentha aquatica x spicata = M. x piperita | IE, VCH35 West Donegal, Tangaveane | | | 28/8/1952 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Wallington Cultivated GB, VC37 Worcestershire, Alfrick | Arthur Langford Still | Job Edward Lousley | 9/1940 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC3 South Devon, Yelverton | Cyril West | | 8/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Hick's Mill, Gwennap | Cyril West | | 9/1948 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC37 Worcestershire, Malvern | Alfred Rayney Waller | John Durbin Gray | 7/1884 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC64 Mid-west Yorkshire, Tadcaster | J Jackson | John Durbin Gray | 7/1881 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC37 Worcestershire, Old Storridge Common | James Henry Augustus Steuart | John Durbin Gray Robert Lloyd Praeger | 8/1892 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Helston | James Cunnack | Botanical Exchange Club of The British Isles John Durbin Gray | 9/1881 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC61,VC62,VC64, York | Henry John Wilkinson | John Durbin Gray | 9/1883 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC38 Warwickshire, Warwick | John Fraser | John Durbin Gray | 10/9/1878 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC38 Warwickshire, Warwick | John Fraser | John Durbin Gray | 10/9/1878 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Newquay | Chambre Corker Vigurs | A Hosking Edward Morell Holmes | 8/1904 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC38 Warwickshire, Brailes | Cecil Prescott Hurst George Claridge Druce | Joseph Edward Little | 1923 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC64 Mid-west Yorkshire, Tadcaster | J Jackson | Arthur Bennett | 8/1881 | CGE |
| Mentha aquatica x spicata = M. x piperita var. crispa | GB, VC67 South Northumberland, Langley | George Johnston | | 10/9/1834 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC42 Breconshire, Llanwrtyd | R Lewis | | 4/8/1956 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC34 West Gloucestershire, Mitcheldean | Augustin Ley | | 13/9/1877 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC9 Dorset, Edmondsham Cultivated | Edward Francis Linton | Edward Francis Linton | 2/9/1910 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC102 South Ebudes, Colonsay GB, VC9 Dorset, Edmondsham Cultivated | Edward Francis Linton | Edward Francis Linton | 15/9/1909 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC9 Dorset, Edmondsham Cultivated | Edward Francis Linton | Edward Francis Linton | 2/9/1910 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC88 Mid Perthshire, Glen Lyon | William Richardson Linton | William Richardson Linton | 1/8/1891 | CGE |
| Mentha aquatica x spicata = M. x piperita var. crispa | GB, VC58 Cheshire, Oxton | Alban Edward Lomax | | 23/8/1886 | CGE |
| Mentha aquatica x spicata = M. x piperita var. citrata | GB, VC57 Derbyshire | Stubbs | Charles Cardale Babington Elizabeth Anne Lomax | 8/1876 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC2 East Cornwall, Boscastle | Arthur Langford Still | Job Edward Lousley | 1/8/1940 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC5 South Somerset, Bossington | Edward Shearburn Marshall | | 14/9/1907 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC88 Mid Perthshire, Fortingall | Edward Shearburn Marshall | | 2/9/1913 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC9 Dorset, Tarrant Monkton | Richard Paget Murray | Edward Shearburn Marshall | 17/9/1892 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC88 Mid Perthshire, Fortingall | Charles Edward Moss | | 2/9/1913 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC88 Mid Perthshire, Fortingall | Charles Edward Moss | | 2/9/1913 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC70 Cumberland, Skirwith | Clara Winsome Muirhead | Job Edward Lousley Carlisle Museum Herbarium | 27/8/1949 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC9 Dorset, Tarrant Monkton | Richard Paget Murray | Richard Paget Murray | 17/9/1892 | CGE |